Heat Exchange Structure

ABSTRACT

The present disclosure provides a heat exchange structure, which includes a metal base; and a plurality of flow-passing holes disposed on the metal base, and at least part of the plurality of flow-passing holes being communicated with each other. An disclosure of the technical solution of the present disclosure can effectively solve the problem of low heat exchange efficiency between stainless steel ice cubes and drinks in the related technology.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority to Chinese patent application No.202110915913.6 and No. 202121862300.2, filed to the China NationalIntellectual Property Administration on Aug. 10, 2021, the disclosure ofwhich is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a field of articles for daily use, inparticular to a heat exchange structure.

BACKGROUND

When having drinks, people sometimes add ice cubes to their drinks tocool them down. However, since traditional ice cubes are made of water,melting them in a drink can make the drink less concentrated and lessflavorful, which in turn affects the taste.

The current way to solve the above problem is to use stainless steel icecube as an alternative to traditional ice cubes, first to cool down thestainless steel ice cube, and then put the stainless steel ice cube intothe drink, so that the stainless steel ice cube exchanges heat with thedrink to have the effect of cooling for the drink. However, at present,the heat exchange efficiency between stainless steel ice cubes anddrinks on the market is low, makes the drinks cool down slowly, whichaffects the user experience.

SUMMARY

The main purpose of the present disclosure is to provide a heat exchangestructure to solve the problem of low heat exchange efficiency betweenstainless steel ice cubes and drinks in the related technology.

To achieve the above purpose, the present disclosure provides a heatexchange structure, which includes a metal base; and a plurality offlow-passing holes disposed on the metal base, and at least part of theplurality of flow-passing holes being communicated with each other.

In some embodiments, the plurality of flow-passing holes are a pluralityof through holes penetrating through the metal base, and the pluralityof through holes are communicated with each other.

In some embodiments, an axis of each of the plurality of through holesis a straight line, an arc or a fold line.

In some embodiments, the metal base has a hexahedral structure, thehexahedral structure includes two first side walls arranged opposite toeach other, two second side walls arranged opposite to each other andarranged between the two first side walls, and two third side wallsarranged opposite to each other and arranged between the two first sidewalls and two second side walls, and the plurality of through holesinclude at least one first through hole penetrating through the twofirst side walls, at least one second through hole penetrating throughtwo the second side walls, and at least one third through holepenetrating through the two third side walls.

In some embodiments, the metal base includes a plurality of housingstructures nested layer by layer from inside to outside, and each of theplurality of housing structure is provided with the plurality offlow-passing holes.

In some embodiments, the heat exchange structure further includes acentral block disposed in an innermost housing structure of theplurality of housing structures.

In some embodiments, a number of the plurality of the housing structuresis within 3 layers and 6 layers.

In some embodiments, the housing structure includes a plurality of ribsdisposed in a staggered way, and the plurality of ribs enclose theplurality of flow-passing holes.

In some embodiments, the housing structure includes a first housing anda second housing connected with each other, and the first housing andthe second housing enclose a receiving chamber.

In some embodiments, one of the first housing and the second housing isprovided with a fitting protrusion, and the other of the first housingand the second housing is provided with a fitting groove, and thefitting protrusion is in interference connection with the fittinggroove.

In some embodiments, a difference between an inner diameter of the metalbase and an outer diameter of the central block is between 2 mm and 5mm, and a difference in inner diameter between adjacent housingstructures is within 2 mm and 5 mm.

In some embodiments, the metal base has a spherical structure or apolyhedral structure; a mass of the heat exchange structure is within 20g and 100 g; and the heat exchange structure is made of stainless steel.

With the technical solution of the present disclosure, the heat exchangestructure includes a metal base. Metal is a material with largerspecific heat capacity, so the metal is used to process the base of theheat exchange structure, which can make the heat exchange structure havebetter cold storage or heat storage capacity. A plurality offlow-passing holes are disposed on the metal base, and the disposing ofthe flow-passing hole can enlarge a specific surface area of the heatexchange structure, thereby increasing a contact area between the liquidand the heat exchange structure and improving the heat exchange effectbetween the heat exchange structure and the liquid. In addition, atleast part of the plurality of flow-passing holes of the presentdisclosure are communicated with each other, and the flow-passing holescommunicated with each other enable liquid to flow in the metal base,thereby improving the probability of contact between the liquid and themetal base and further improving the heat exchange efficiency of theheat exchange structure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, forming part of the present disclosure, serveto provide a further understanding for the present disclosure, and theexemplary embodiments of the present disclosure as well as theillustrations thereof serve to explain the present disclosure and do notconstitute an undue limitation of the present disclosure. In thedrawings:

FIG. 1 shows a front view of Embodiment 1 of a heat exchange structureaccording to the present disclosure;

FIG. 2 shows a perspective view of the heat exchange structure of FIG. 1;

FIG. 3 shows a front view of Embodiment 2 of the heat exchange structureaccording to the present disclosure;

FIG. 4 shows a perspective view of the heat exchange structure of FIG. 3;

FIG. 5 shows a schematic structural diagram of Embodiment 3 of the heatexchange structure according to the present disclosure; and

FIG. 6 shows an enlarged structural diagram at A of the heat exchangestructure of FIG. 5 .

The above drawings include the following reference signs:

10: metal base; 11: housing structure; 111: first housing; 1111: fittingprotrusion; 112: second housing; 1121: fitting groove; 13: first sidewall; 14: second side wall; 15: third side wall; 20: flow-passing hole;21: first through hole; 22: second through hole; 23: third through hole;30: central block.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A clear and complete description of the technical solution in theembodiments of the present disclosure will be made below in conjunctionwith the accompany drawings in the embodiments of the present disclosureare present. Obviously, the described embodiments are only part of theembodiments of the present disclosure, but not all of them. Thefollowing description of at least one exemplary embodiment is in factmerely illustrative and is in no way intended to limit the presentdisclosure and its disclosure or use. Based on the embodiments of thepresent disclosure, all other embodiments obtained by those ordinarilyskilled in the art without exerting creative effort fall within thescope of protection of the present disclosure.

It should be noted that the terms used herein are intended to depict thedetailed description only and are not intended to limit exemplaryembodiments according to the present disclosure. As used herein, thesingular form is also intended to encompass the plural form unless thecontext clearly dictates otherwise, and it should also be understoodthat when used in the description, the terms “comprising” and/or“including” indicate the presence of features, steps, operations,devices, components and/or combinations thereof.

Unless otherwise specified, the relative arrangement, numericalexpressions and values of components and steps set forth in theseembodiments do not limit the scope of the present disclosure. At thesame time, it should be understood that for ease of description, thedimensions of respective parts shown in the drawings are not drawn toactual scale. Techniques, methods and devices known to those ordinarilyskilled in the relevant art may not be discussed in detail, but whereappropriate, the techniques, methods and devices should be regarded aspart of the authorized description. In all the examples shown anddiscussed herein, any specific value should be interpreted as exemplaryonly and not as a limitation. Thus, other examples of the exemplaryembodiment can have different values. It should be noted that similarreference numerals and letters denote similar items in the followingfigures, and therefore, once a certain item is defined in one figure, itis not necessary to further discuss it in the following figures.

After long-term research, the inventor found that there are two mainreasons for the low heat exchange efficiency of the existing stainlesssteel ice cubes in the market. On the one hand, the surface area of theexisting stainless steel ice cube is small, which leads to a limitedcontact area between the stainless steel ice cubes and drinks, so it isdifficult for drinks to cool down quickly. On the other hand, since theexisting stainless steel ice cubes are all solid structures, drinkscannot flow in the stainless steel ice cubes, making it difficult fordrinks to cool down quickly. To solve these two problems, the presentdisclosure designs a heat exchange structure, in particular:

as shown in FIGS. 1 and 2 , a heat exchange structure of Embodiment 1includes a metal base 10 and a plurality of flow-passing holes 20. Aplurality of flow-passing holes 20 are disposed on the metal base 10,and at least part of the plurality of flow-passing holes 20 arecommunicated with each other.

With the technical solution of Embodiment 1, the heat exchange structureincludes a metal base 10. Metal is a material with a larger specificheat capacity, so the metal is used to process the base of the heatexchange structure, which can make the heat exchange structure havebetter cold storage or heat storage capacity. A plurality offlow-passing holes 20 are disposed on the metal base 10, the disposingof the flow-passing hole 20 can enlarge a specific surface area of theheat exchange structure, thereby increasing a contact area between theliquid and the heat exchange structure and improving the heat exchangeeffect between the heat exchange structure and the liquid. In addition,at least part of the plurality of flow-passing holes 20 of the presentdisclosure are communicated with each other, and the flow-passing holes20 communicated with each other enable liquid to flow in the metal base10, thereby improving the probability of contact between the liquid andthe metal base 10 and further improving the heat exchange efficiency ofthe heat exchange structure.

It should be noted that “at least part of the flow-passing holes 20communicate with each other” as described above includes two cases, in afirst case, a part of the plurality of flow-passing holes 20 communicatewith each other, and the other part of the flow-passing holes 20 are notcommunicated with each other. In a second case, all the flow-passingholes 20 are communicated with each other.

It should also be noted that the heat exchange structure of the presentdisclosure can not only cool the liquid, but also raise the temperatureof the liquid. In addition, the heat exchange structure of the presentdisclosure is not limited to disclosures for heating or cooling drinks,but may also be applied to disclosures for cooling or heating otherliquids other than drinks in industry.

As shown in FIGS. 1 and 2 , in Embodiment 1, the plurality offlow-passing hole 20 area plurality of through holes penetrating throughthe metal base 10, and the plurality of through holes are communicatedwith each other. In the above structure, the flow-passing hole 20 canpenetrate through the metal base 10, so that liquid can enter the metalbase 10 for sufficient heat exchange with the metal base 10, and theliquid after exchanging heat with the metal base 10 can also flow out ofthe flow-passing hole 20 for exchanging heat with other liquids, so thatthe liquid can be rapidly and uniformly cooled or warmed.

It should be noted that both ends of the “through hole” have openings,and the two openings are located on a surface of the metal base 10.

Specifically, as shown in FIGS. 1 and 2 , in Embodiment 1, an axis ofthe through hole is a straight line.

Certainly, in other embodiments not shown in the figures, the axis ofthe through hole may also be an arc or a fold line.

As shown in FIGS. 1 and 2 , in Embodiment 1, the metal base 10 has ahexahedral structure, the hexahedral structure includes two first sidewalls 13 arranged opposite to each other, two second side walls 14arranged opposite to each other and arranged between the two first sidewalls 13, and two third side walls 15 arranged opposite to each otherand arranged between the two first side walls 13 and the two second sidewalls 14, and the plurality of through holes include at least one firstthrough hole 21 penetrating through the two first side walls 13, atleast one second through hole 22 penetrating through the two second sidewalls 14, and at least one third through hole 23 penetrating through thetwo third side walls 15.

Specifically, in the hexahedral structure shown in FIGS. 1 and 2 , onlyone first through hole 21 is disposed on the first side wall 13, onlyone second through hole 22 is disposed on the second side wall 14, andonly one third through hole 23 is disposed on the third side wall 15.The above structure can enhance the flow of liquid in the metal base 10,thereby improving the cooling effect of the heat exchange structure onthe liquid.

As shown in FIG. 3 and FIG. 4 , Embodiment 2 differs from Embodiment 1in that the number of through holes on the hexahedral structure isdifferent. Specifically, in Embodiment 2, four first through holes 21are provided on the first side wall 13, four second through holes 22 areprovided on the second side wall 14, and four third through holes 23 areprovided on the third side wall 15. The above structure can furtherincrease a flow area of the metal base 10, thereby further improving thecooling effect of the heat exchange structure on the liquid.

It should be noted that the metal matrices 10 of Embodiments 1 and 2 mayalso have a spherical structure. An area of the flow-passing hole inEmbodiment 1 is between 0.5 mm² and 1 mm², and an area of theflow-passing hole in Embodiment 2 is between 0.2 mm² and 0.6 mm².

As shown in FIGS. 5 and 6 , Embodiment 3 differs from Embodiment 1 andEmbodiment 2 in that the structure of the metal base 10 is different.Specifically, in Embodiment 3, the metal base 10 includes a plurality ofhousing structures 11 nested layer by layer from inside to outside, andeach housing structure 11 is provided with the plurality of flow-passingholes 20. In the above structure, the plurality of housing structures 11nested layer by layer can further increase the specific surface area ofthe metal base 10, thereby further increasing the contact area betweenthe liquid and the heat exchange structure, and improving the heatexchange effect between the heat exchange structure and the liquid. Atthe same time, providing a plurality of flow-passing holes 20 on eachhousing structure 11 can increase the flow of liquid through the metalbase 10, and make sufficient heat exchange with the metal base 10, so asto improve the cooling and heating rate of the liquid. By increasing thecontact area between the metal base 10 and the liquid and increasing theflow area of the liquid flowing through the metal base 10, the abovestructure improves the probability of the liquid contacting with themetal base 10, and further improves the heat exchange efficiency of theheat exchange structure.

As shown in FIGS. 5 and 6 , in Embodiment 3, the heat exchange structurefurther includes a center block 30, the central block 30 is disposed inan innermost housing structure 11. In the above structure, the centralblock 30 is a solid structure, and the central block 30 disposed in thehousing structure 11 can increase a total mass of the heat exchangestructure, thereby making the heat exchange structure have greater coldstorage or heat storage capacity and improving the heat exchange effectof the heat exchange structure.

Specifically, the number of the housing structures 11 is within 3 layersand 6 layers. When a diameter of the outermost housing structure 11 isfixed, if the number of layers of the housing structure 11 is too small,it will lead to a small total mass of the heat exchange structure, whichin turn will lead to a low heat storage capacity of the heat exchangestructure and a limited ability of the individual heat exchangestructure to cool down the liquid. If the number of layers of thehousing structure 11 is too large, the heat exchange structure isdifficult to clean, and the cleanliness of the heat exchange structureis affected. As shown in FIGS. 5 and 6 , in Embodiment 3, the number ofthe housing structure 11 is four, and the above structure can ensure thecold storage capacity of the heat exchange structure on the one hand,and facilitate the cleaning of the housing structure 11 on the otherhand.

Certainly, in other embodiments not shown in the figures, the number ofhousing structures 11 may also be 3, 5 or 6 layers.

As shown in FIGS. 5 and 6 , in Embodiment 3, the housing structure 11includes a plurality of ribs disposed in a staggered way, and theplurality of ribs enclose the flow-passing hole 20. In the abovestructure, the housing structure 11 is similar to a grid structure, andgrid holes form the flow-passing holes 20. The structure can increasethe liquid flow area of the housing structure 11, thereby increasing theprobability of contact between the liquid and the housing structure 11and further improving the heat exchange efficiency of the heat exchangestructure.

Specifically, in Embodiment 3, a cross-sectional area of each rib iswithin 0.4 mm² and 0.8 mm².

It should be noted that in Embodiment 3, an area of the flow-passinghole 20 is within 6 mm² and 15 mm². Preferably, the area of theflow-passing hole 20 in Embodiment 3 is 9 mm².

As shown in FIGS. 5 and 6 , in Embodiment 3, the housing structure 11includes a first housing 111 and a second housing 112 connected witheach other, and the first housing 111 and the second housing 112 enclosea receiving chamber. In the above structure, the housing structure 11 inthe inner layer is disposed in the receiving chamber of the housingstructure 11 in the outer layer. The above structure facilitatesdisassembly and installation of the housing structure 11, therebyfacilitating cleaning of the housing structure 11 by a user.

As shown in FIGS. 5 and 6 , in Embodiment 3, the first housing 111 isprovided with a fitting protrusion 1111, and the second housing 112 isprovided with a fitting groove 1121, and the fitting protrusion 1111 isin interference connection with the fitting groove 1121. In the abovestructure, when mounting the first housing 111 and the second housing112, it is only necessary to place the receiving chambers of the firsthousing 111 and the second housing 112 opposite to each other and pressthe first housing 111 and the second housing 112 so that the fittingprotrusion 1111 can extend into the fitting groove 1121. The process ofdisassembling the housing structure 11 is a reverse process of theinstallation process, and will not be repeated again. Theabove-mentioned structure is simple, convenient for machining, and canimprove the assembly and disassembly efficiency of the first housing 111and the second housing 112.

Certainly, in other embodiments, the fitting protrusion may also beprovided on the second housing and the fitting groove may be provided onthe first housing.

As shown in FIGS. 5 and 6 , the difference between the inner diameter ofthe metal base 10 and the outer diameter of the central block 30 iswithin 2 mm and 5 mm, and the difference in inner diameter betweenadjacent housing structures 11 is within 2 mm and 5 mm. Specifically,the difference in inner diameters between adjacent housing structures 11may be 2 mm, 4 mm or 5 mm. In the present embodiment, a diameter of thecentral block 30 is 6 mm, and diameters of the housing structures 11 are10 mm, 15 mm, 20 mm, 25 mm in order from inside to outside.

It should be noted that when the metal base 10 has a sphericalstructure, the above-mentioned “inner diameter” refers to the innerdiameter of each layer of the housing structure 11; and when the metalbase 10 has a cubic structure, the above-mentioned “inner diameter”refers to a distance in a length direction or a distance in a widthdirection of an inner wall of each layer of the housing structure 11.When the central block 30 has a spherical structure, the above-mentioned“outer diameter” refers to the outer diameter of the central block 30;and when the central block 30 has a cubic structure, the above-mentioned“outer diameter” refers to a distance in the length direction or adistance in a width direction of an outer wall of the central block 30.

As shown in FIGS. 5 and 6 , in Embodiment 3, the metal base 10 has aspherical structure.

Certainly, in other embodiments, the metal base may also have apolyhedral structure. It should be noted that the polyhedral structureincludes at least two faces (spherical segmental structure). Preferably,the metal base may have a hexahedral structure.

As shown in FIGS. 5 and 6 , in Embodiment 3, the mass of the heatexchange structure is within 20 g and 100 g. In the above structure, ifthe mass of the heat exchange structure is too small, the heat storagecapacity of the heat exchange structure will be reduced, as a result,the effect of the heat exchange structure on liquid cooling or heatingis not obvious. If the mass of the heat exchange structure is too large,it will bring inconvenience to users. Specifically, the mass of the heatexchange structure may be 20 g, 40 g, 60 g, 80 g, and 100 g. Preferably,the mass of the heat exchange structure in Embodiment 3 is 80 g.

The structure enables the heat exchange structure to have sufficientcold storage or heat storage capacity and improves the heat exchangeeffect of the heat exchange structure.

As shown in FIGS. 5 and 6 , in Embodiment 3, the heat exchange structureis made of stainless steel. The structure can improve the corrosionresistance of the heat exchange structure, thereby improving the safetyand service life of the heat exchange structure. It should be noted thatwhen the heat exchange structure is used to cool down drinks, thematerial of the heat exchange structure needs to be food grade.

It should be noted that a plurality of heat exchange structures can beput into the liquid at the same time to exchange heat for the liquid.

In the description of the present disclosure, it should be understoodthat, orientation or positional relationships indicated by orientationwords such as “front, back, up, down, left, right”, “lateral, vertical,perpendicular, horizontal” and “top, bottom” are generally based on theorientation or positional relationships shown in the drawings, for easeof description of the present disclosure and simplification of thedescription only, these orientation words do not indicate or imply thatthe apparatus or element referred to must have a specific orientation orbe constructed and operated in a specific orientation, and thereforecannot be construed as limitations to the scope of the presentdisclosure. The orientation words “inside and outside” refer to theinside and outside relative to the outline of each component itself.

For ease of description, spatially relative terms such as “over”,“above”, “on an upper surface of”, “upper”, etc. may be used herein todescribe the spatial positional relationship of one device or featurewith other devices or features as shown in the figures. It should beunderstood that the spatially relative term is intended to encompassdifferent orientations in use or operation of the device other thanthose depicted in the figures. For example, if the devices in thedrawings are inverted, devices described as “above” or “over” otherdevices or structures will be positioned as “below” or “under” otherdevices or structures. Thus, the exemplary term “above” may include both“above” and “below” orientations. The device can also be positioned indifferent other ways (rotated 90 degrees or in other orientations), andthe spatially relative description used herein is interpretedaccordingly.

In addition, it should be noted that the words “first”, “second” and thelike are used to define parts only for the purpose of distinguishing thecorresponding parts. Unless otherwise stated, the above words have nospecial meaning and therefore cannot be understood as limitations to thescope of protection of the present disclosure.

The foregoing is merely a preferred embodiment of the present disclosureand is not intended to limit the present disclosure which may be subjectto various modifications and variations to those skilled in the art. Anymodification, equivalent replacement, improvement, etc. made within thespirit and principles of the present disclosure should be included inthe scope of protection of the present disclosure.

What is claimed is:
 1. A heat exchange structure, comprising: a metalbase; and a plurality of flow-passing holes disposed on the metal base,and at least part of the plurality of flow-passing holes beingcommunicated with each other.
 2. The heat exchange structure as claimedin claim 1, wherein the plurality of flow-passing holes are a pluralityof through holes penetrating through the metal base, and the pluralityof through holes are communicated with each other.
 3. The heat exchangestructure as claimed in claim 2, wherein an axis of each of theplurality of through holes is a straight line, an arc or a fold line. 4.The heat exchange structure as claimed in claim 2, wherein the metalbase has a hexahedral structure, the hexahedral structure comprises twofirst side walls arranged opposite to each other, two second side wallsarranged opposite to each other and arranged between the two first sidewalls, and two third side walls arranged opposite to each other andarranged between the two first side walls and the two second side walls,and the plurality of through holes comprise at least one first throughhole penetrating through the two first side walls, at least one secondthrough hole penetrating through the two second side walls, and at leastone third through hole penetrating through the two third side walls. 5.The heat exchange structure as claimed in claim 1, wherein the metalbase comprises a plurality of housing structures nested layer by layerfrom inside to outside, and each of the plurality of housing structureis provided with the plurality of flow-passing holes.
 6. The heatexchange structure as claimed in claim 5, wherein the heat exchangestructure further comprises a center block, and the central block isdisposed in an innermost housing structure of the plurality of housingstructures.
 7. The heat exchange structure as claimed in claim 5,wherein a number of the plurality of the housing structures is within 3layers and 6 layers.
 8. The heat exchange structure as claimed in claim5, wherein the housing structure comprises a plurality of ribs disposedin a staggered way, and the plurality of ribs enclose the plurality offlow-passing holes.
 9. The heat exchange structure as claimed in claim5, wherein the housing structure comprises a first housing and a secondhousing connected with each other, and the first housing and the secondhousing enclose a receiving chamber.
 10. The heat exchange structure asclaimed in claim 9, wherein one of the first housing and the secondhousing is provided with a fitting protrusion, and the other of thefirst housing hole and the second housing is provided with a fittinggroove, and the fitting protrusion is in interference connection withthe fitting groove.
 11. The heat exchange structure as claimed in claim6, wherein a difference between an inner diameter of the metal base andan outer diameter of the central block is between 2 mm and 5 mm, and adifference in inner diameter between adjacent housing structures iswithin 2 mm and 5 mm.
 12. The heat exchange structure as claimed inclaim 1, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.
 13. The heat exchange structure as claimed inclaim 6, wherein the housing structure comprises a first housing and asecond housing connected with each other, and the first housing and thesecond housing enclose a receiving chamber.
 14. The heat exchangestructure as claimed in claim 7, wherein the housing structure comprisesa first housing and a second housing connected with each other, and thefirst housing and the second housing enclose a receiving chamber. 15.The heat exchange structure as claimed in claim 8, wherein the housingstructure comprises a first housing and a second housing connected witheach other, and the first housing and the second housing enclose areceiving chamber.
 16. The heat exchange structure as claimed in claim2, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.
 17. The heat exchange structure as claimed inclaim 3, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.
 18. The heat exchange structure as claimed inclaim 4, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.
 19. The heat exchange structure as claimed inclaim 5, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.
 20. The heat exchange structure as claimed inclaim 6, wherein the metal base has a spherical structure, or the metalsubstrate has a polyhedral structure; a mass of the heat exchangestructure is within 20 g and 100 g; and the heat exchange structure ismade of stainless steel.